Chair



FIG. 1 is a front perspective view of the design for a chair;

FIG. 2 is a front elevational view of the design for a chair, as seen in FIG. 1;

FIG. 3 is a rear elevational view of the design for a chair, as seen in FIG. 1;

FIG. 4 is a left-side elevational view of the design for a chair, as seen in FIG. 1; the other side being a mirror image thereof; and,

FIG. 5 is a top planar view of the design for a chair, as seen in FIG. 1. 

CLAIM The ornamental design for a chair, as shown and described. 